Name of Plugin: PostalService
Plugin version: 1.0.7
Minecraft version compatibility: 1.10
Link: https://dev.bukkit.org/bukkit-plugins/postalservice/Brief description on what it does and adds:end just about anything
PostalService can handle different mail types, allowing practically anything to be sent as mail. PostalService comes with 4 built-in mail types and other developers can create their own mail types too!
Four built-in mail types (You can configurate them)Letter - a text only message.
Package - in-game items.
Payment - in-game money. (Requires Vault)
Experience - XP points (not levels)
PostalService allows you to register chests as mailboxes. Clicking a mailbox opens up the main menu where you can read your mail. You can even require a mailbox to be nearby when players send mail, making mailboxes the hub of all mail related activities.
A good suggestion to the not always working mailing system we have now.